Multi-domain network and method for multi-domain network

Abstract

Each domain of a multi-domain network collects intra-domain routing information relating to that domain and makes a reduced view of that information available to other domains of the network, and in which each domain of the network uses its own intra-domain routing information together with the reduced-view routing information from the other domains to form a logical view of the network so as to enable that domain to make an end-to-end route selection decision.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a multi-domain network and a method for use in a multi-domain network.[0003]2. Description of the Related Art[0004]In a multi-domain network there is provided a multi-connected network of different Autonomous Systems (AS). In a multi-provider environment, each AS or groups of aSs belong to different, independent network providers.[0005]Such types of network do not exist at present to any large extent, owing in large part to the ubiquitous hierarchical structure of the current Internet. However, in the near future, multi-domain network with a flat connection structure will come to the fore in telecommunications. With such a structure, different operators on the same level will connect to each other's network and offer transport services with different Quality of Service (QoS) guarantees.[0006]However, the above new network structure causes some new problems and issues in the area of routi...

AI Technical Summary

Benefits of technology

The present invention provides a method for selecting a route in a multi-domain network environment, where each domain collects intra-domain routing information and makes a reduced view of that information available to other domains. Each domain uses its own intra-domain routing information and the reduced-view routing information from other domains to form a logical view of the network, allowing it to make an end-to-end route selection decision based on the logical view. The method takes into account factors like traffic capacity and quality of service, and can handle communication failures and changes in network topology. The invention also provides an apparatus for performing the method and a program for controlling the apparatus. The technical effects of the invention include improved route selection and efficient network utilization.

Problems solved by technology

However, the above new network structure causes some new problems and issues in the area of routing and resource allocation.

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